[Bitcoin-development] CLTV opcode allocation; long-term plans?
pete at petertodd.org
Sat May 9 09:12:01 UTC 2015
On Tue, May 05, 2015 at 01:54:33AM +0100, Btc Drak wrote:
> > That said, if people have strong feelings about this, I would be willing
> > to make OP_CLTV work as follows:
> > <nLockTime> 1 OP_CLTV
> > Where the 1 selects absolute mode, and all others act as OP_NOP's. A
> > future relative CLTV could then be a future soft-fork implemented as
> > follows:
> > <relative nLockTime> 2 OP_CLTV
> > On the bad side it'd be two or three days of work to rewrite all the
> > existing tests and example code and update the BIP, and (slightly) gets
> > us away from the well-tested existing implementation. It also may
> > complicate the codebase compared to sticking with just doing a Script
> > v2.0, with the additional execution environment data required for v2.0
> > scripts cleanly separated out. But all in all, the above isn't too big
> > of a deal.
> Adding a parameter to OP_CLTV makes it much more flexible and is the most
> economic use of precious NOPs.
> The extra time required is ok and it would be good to make this change to
> the PR in time for the feature freeze.
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